Which one should I use?

In most situations, and if you are new to CiviCRM, you should choose the latest stable version. It contains new features and receives the most support. 4.2 LTS (long term support) is provided for those organizations who are using an older version of CiviCRM and are not yet ready to upgrade; it receives critical bug fixes only. More about 4.2 LTS.

New Installations

Upgrading to 4.3

If your site is highly customized with special code or theming for CiviCRM you will want to upgrade a test copy first and test your customizations. For everyone else, follow these simple steps to get yourself up and running with 4.3.

Contributors

Community support and engagement is the force that sustains and drives CiviCRM forward. This release would not have been possible without the incredible contributions of these people and organizations: